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compiler: Add __designated_init annotation

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This allows structure annotations for requiring designated initialization
in GCC 5.1.0 and later:
https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html

The structure randomization layout plugin will be using this to help
identify structures that need this form of initialization.

Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2017-04-05 09:49:19 -07:00
parent 1132e1e448
commit 0aa5e49c68
2 changed files with 12 additions and 0 deletions
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8
include/linux/compiler-gcc.h
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@ -294,6 +294,14 @@
#define __no_sanitize_address __attribute__((no_sanitize_address))
#endif
#if GCC_VERSION >= 50100
/*
* Mark structures as requiring designated initializers.
* https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html
*/
#define __designated_init __attribute__((designated_init))
#endif
#endif /* gcc version >= 40000 specific checks */
#if !defined(__noclone)

4
include/linux/compiler.h
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@ -440,6 +440,10 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
# define __attribute_const__ /* unimplemented */
#endif
#ifndef __designated_init
# define __designated_init
#endif
#ifndef __latent_entropy
# define __latent_entropy
#endif